D4850H Solid State Relay SPST-NO 50A Equivalent & Substitute Parts

Part Overview

The D4850H is a solid state relay (SSR) manufactured by Sensata-Crydom, designed for AC load switching applications requiring 50A capacity across a 48V to 530V load voltage range. This SPST-NO (1 Form A) hockey puck configuration operates with zero-cross detection and accepts 4–32VDC input control signals. The part maintains active product status with RoHS compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or application-specific requirements.

Substiute Parts

D4850H

Sensata-CrydomIn Stock: 813D4850H Datasheet

Current PartRFQ

84137120N

CrouzetIn Stock: 84984137120N Datasheet

MFR RecommendedRFQ

84137120N

CrouzetIn Stock: 84984137120N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the D4850H is determined by strict alignment of the following electrical and mechanical parameters:

• Circuit Configuration: Must be SPST-NO (1 Form A)
• Output Type: Must be AC with zero-cross detection
• Input Voltage Range: Must accommodate 4–32VDC control signals
• Load Current Rating: Must be rated for 50A
• Load Voltage Range: Must support minimum 48V; upper limit must equal or exceed 530V
• Mounting Type: Must be Chassis Mount
• Package / Case: Must be Hockey Puck form factor
• Termination Style: Must use Screw Terminal configuration

The identified substitute part (84137120N by Crouzet) meets all mandatory electrical parameters and mechanical compatibility requirements. The load voltage range of 48–660V exceeds the D4850H specification, providing extended operational margin within the same physical and electrical interface constraints.

Parameter Comparison

Engineering Selection Recommendations

Both the D4850H and 84137120N are active products with RoHS compliance certification. The 84137120N provides equivalent electrical performance with an extended load voltage rating (660V maximum versus 530V), maintaining full compatibility with the D4850H control interface and mechanical mounting requirements. Selection between these parts should be based on application load voltage requirements and component availability. For applications operating within the 48–530V range, either part is functionally equivalent. For applications requiring operation above 530V up to 660V, the 84137120N is the appropriate selection.

Frequently Asked Questions (FAQ)

Q: Can the 84137120N replace the D4850H in all applications?

A: Yes, provided the application load voltage does not exceed 530V. The 84137120N is rated to 660V and maintains identical input control voltage, current capacity, circuit configuration, and mechanical mounting specifications. Both parts are active products with current RoHS compliance.

Q: What are the key compatibility factors for substitution?

A: Substitution is valid when the following parameters match: SPST-NO circuit configuration, AC zero-cross output type, 4–32VDC input range, 50A load current rating, hockey puck package form factor, screw terminal connections, and chassis mount orientation. Load voltage capability must equal or exceed the application requirement.

Q: Are there physical differences between the D4850H and 84137120N?

A: Both parts use identical hockey puck form factor packaging with screw terminal connections and chassis mount configuration. No mechanical modifications are required for substitution.

Q: What is the significance of the extended voltage rating on the 84137120N?

A: The 84137120N load voltage range of 48–660V encompasses the D4850H specification of 48–530V. This extended rating provides operational margin for applications approaching the upper voltage limit without requiring component redesign.

Q: Are both parts RoHS compliant?

A: Yes. Both the D4850H and 84137120N carry RoHS compliance certification and are classified as active products.